SB20260721140 - Anolis OS update for kernel:5.10

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Main Vulnerability Database SB20260721140

SB20260721140 - Anolis OS update for kernel:5.10

Published: July 21, 2026

Security Bulletin ID SB20260721140
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2026-43499)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in remove_waiter() when rolling back a proxy lock from futex_requeue(). A local user can trigger the affected rtmutex slowlock and proxy-lock rollback path to cause a denial of service.

The issue can leave waiter task state uncleared and operate on the wrong top priority waiter task.


2) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43503)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to modify the page cache of a root-owned read-only file.

The vulnerability exists due to improper state management in frag-transfer helpers in the Linux kernel networking stack when moving fragment descriptors between socket buffers. A local user can trigger packet processing through a duplicated skb path to modify the page cache of a root-owned read-only file.

One demonstrated path involves ESP input after a packet is duplicated through an nft 'dup to' rule or another nf_dup_ipv4() / xt_TEE caller.


3) NULL pointer dereference (CVE-ID: CVE-2026-53166)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a NULL pointer dereference in remove_waiter() in the futex requeue logic when handling FUTEX_CMP_REQUEUE_PI operations that requeue a non-top waiter which already owns the target PI futex. A local user can trigger a self-deadlock condition to cause a denial of service.


Remediation

Install update from vendor's website.

References